Calendar
You can subscribe to the calendar in the XML (for feed readers) and
the iCalendar (for calendar programs) format:
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http://www.google.com/calendar/feeds/vgk8kv1p8doiml3oks2afj6cvo%40group.calendar.google.com/public/basic
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http://www.google.com/calendar/ical/vgk8kv1p8doiml3oks2afj6cvo%40group.calendar.google.com/public/basic.ics
Just copy one of the links above (eg. via your browser's context menu) and paste it into your favorite calendar program to get updates automatically. The format depends on the program of your choice.